A minimal Django app that implements Device models that can send messages through APNS, FCM/GCM and WNS. The app also implements an admin panel, through which you can test single and bulk notifications. Select one or more FCM/GCM, APNS or WNS devices and in the action dropdown, select "Send test message" or "Send test message in bulk", accordingly. Note that sending a non-bulk test message to more than one device will just iterate over the devices and send multiple single messages. UPDATE_ON_DUPLICATE_REG_ID: Transform create of an existing Device (based on registration id) into a update. See below Update of device with duplicate registration ID for more details.